How to enable PHP DOM extension?

Server Management
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1

I just moved my WordPress website to a new server, and now I see a message that says, ‘Please enable the DOM extension in your PHP configuration.’ After some research, I found that the DOM extension needs to be enabled in my php.ini file. However, I’m unsure where to make the changes. How can I enable the DOM extension in php.ini?

2

By default, the DOM extension should already be enabled in PHP. You can check if the extension exists by running the command in your terminal.

php -m

If the extension is missing, it may not be installed on your server. You can install it by running the command:

sudo apt-get install php-xml

or specific version of the extension

sudo apt-get install php8.1-xml

If the extension is still not enabled, you can enable it by editing your PHP configuration file (php.ini).

  • Search for the following line in the file: “;extension=dom.so”.
  • Remove the semicolon “;” at the beginning of the line to uncomment it,
  • Or add “extension=dom.so” if it’s not already there.
  • Save the file and restart your web server (e.g. Apache, Nginx) and PHP.

After completing these steps, you can run the command php -m again to confirm that the DOM extension is enabled, and the output should look like this.

[PHP Modules]
...
dom 
...

[Zend Modules]
Zend OPcache